How was WW1 a Global War?

The war became a "global" war when Germany decided they wanted world domination, they wanted a new devision of the world. Germany began fighting countries which caused allies to join. Making more wars and battles with countries helping each other out. Then, Germany tried to capture Boston, wanting New York. Germany also wanted Peru. They got Africa on their side. Having African's apart of the war. Then British needed more troops adding Japan to the war. And so on. This war was ONE country looking for power and looking all over the world for it.